Regenerated ChargingStationId's toString using Guava
Removed unneeded StringBuilders
Converted field to local
Fixed JavaDoc issues
Added tests for UnlockEvseRequestedEvent
Added tests for UnlockEvseCommand
Added tests for SoftResetChargingStationRequestedEvent
Added tests for HardResetChargingStationRequestedEvent
Added tests for RequestHardResetChargingStationCommand
Added tests for RequestSoftResetChargingStationCommand